Adjustable dispersion reduction in low-coherent techniques by a system of tilted metallic mirrors with dielectric coating
| Autor: | Leszek Salbut, Slawomir Tomczewski |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
medicine.diagnostic_test business.industry Mechanical Engineering Drop (liquid) Dielectric Fresnel equations engineering.material Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Metal Interferometry Optics Optical coherence tomography Coating visual_art medicine visual_art.visual_art_medium engineering Light beam Electrical and Electronic Engineering business |
| Zdroj: | Optics and Lasers in Engineering. 68:121-125 |
| ISSN: | 0143-8166 |
| DOI: | 10.1016/j.optlaseng.2014.12.017 |
| Popis: | In this paper a new method for adjustable reduction of a dispersive drop in axial resolution during low-coherent measurements is presented. This method is based on multiple reflections of a light beam from dielectric coated metallic mirrors and is intended for reducing dispersion in full-field systems. The tilted metallic mirror with a dielectric coating works like an adjustable Gires–Tournois interferometer. The concept of adjustability is based on a polarization dependent phase shift upon reflection from metallic surfaces at incidence angles different from θ i = 0 ° . The dispersion compensation was simulated numerically with the use of Fresnel equations for a silver mirror based compensator. The possibility of dispersion reduction was then verified experimentally in a Twyman–Green interferometer showing over 40% improvement in the axial resolution. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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